Lesson objective: Compare two two-digit numbers using a < or > symbol.

This lesson helps to build fluency with two-digit comparisons. The game Ocean World is used here because it supports place value connections. This work develops students' understanding that two two-digit numbers can be compared using the < or > symbol.

Students engage in Mathematical Practice #2 (reason abstractly and quantitatively) as they critically think about the relationship between quantities, using flexible thinking of mathematical symbols.

**Key vocabulary:**

- compare
- create
- digit
- equals sign
- equation
- less
- less than
- greater than
- more
- ones
- similar
- symbol
- tens
- value

**Special materials needed:**

- base ten blocks
- connecting cubes
- Ocean World cards